Central buffer coupling for railway and like vehicles



June 8 1926. 1,588,326

J. MITCHELL ET AL CENTRAL BUFFER COUPLING FOR RAILWAY AND LIKE VEHICLESFiled August 14. 1922 fiwnionr John ml'lcizll, John 6'. 6 UanrqyJfibrgcyst Patented June 8, 1926.

UNITED srA'rEs PATENr OFFICE".

I JOHN MITCHELL AND JOHN CECIL GEORGE cossnY, or LONDON, ENGLAND.

CENTRAL- BUFFER COUPLING non. RAILWAY AND LIKE VEHICLES. I

Application filed August 14, 1922, Serial No. 581,886, andin GreatBritain December 20, 1921. i i

The invention relates to central buffer couplings for railway and likevehicles and consists in improvements by which the under frames are to alarge extent relieved from the draw and buffer stresses. 7

For this purpose the draw and buffer springs are disposed centrally inthe under frame and the stresses exerted on the coupler at one end ofthe vehicle are directly transmitted to the coupler at the other end ofthe vehicle.

V The accompanying drawings illustrate examples of couplings accordingto the invention. Fig. l is a sectional plan of one construction andFig. 2 a similar view of a slight modification.

In the arrangement shown in Fig. 1, the central longitudinals of theunder frame are shown at A and A Two box shaped membersB, B are fittedbetween the under frames and their outward. longitudinal movements .arerestricted by abutments a, a formed on or attached to the under frames.

A drawbar C passes through the inwardly disposed ends b, b -of the boxesB, B and is guided and supported by bearings cl, d provided in theseends. and buffing springs E, E are disposed between the ends 6, b of theboxes. Anauxiliary spring F surrounding the extended end of the drawbarC is compressed between a boss g on the box B and a washer h on thedrawbar, the compression of the spring being adjusted by a nut i screwthreaded on the drawbar.

Bars J, J are slidable in bearings pro vided in the ends 6, b of theboxes B, B and pass through the springs E, E and also through lugs 70,70 on a connecting bridge piece K; these bars are held, respectively,against the box B and the bridge piece K by nuts j and j, which serve toadjust the pressure of the springs E, E 7

A bar G which with the bars J, J forms the drawbar on the right of thevehicle, passes through an aperture provided in the bridge piece K, andan auxiliary spring F is compressed between a boss 9 of the bridge pieceand a washer k on the bar G a nut 2' on the end of the bar serving toadjust the pressure on the spring.

The auxiliary springs F, F take up the initial draft stress. The furtherdraft and the bufiing stresses are taken up by the springs E, E

direction by the abutments a, a

The main draw Bearings M, M provided in the outer then the strongersprings E E The box B cannot move to the left because of the abutmentsa, a? on the left. The drawbar C? and the pin L during the movementslide in the bearing M Under the action of a buffing stress the box B ismoved to the right, compressing the springs E E the box 13 beingprevented from moving in that draft stress is applied in the right handdirection, the stress is transmitted by the rods J hJ 2 to the box Bwhich is moved to the rig t. x I a In the arrangement shown in Fig. 1,the box. B in which the two auxiliary springs g, F are contained islonger than the box The arrangement shown in Fig. 9. differs from thepreceding only in the disposition of the auxiliary springs F, F by whichthe boxes B, B are of the same length. The bars J, J are extended beyondthe inner end wall I) of the box B and are secured to a bridge piece Nadapted to slide on the drawbar O. The auxiliary spring F is disposedbetween the bridge piece N and the end plate I) of the box B. The actionis substantially the same as described in nectionwith Fig. 1.

Central bufier couplers can be applied to vehicles in which the underframes have been designed for side bufiers, since the under frames whichare usually too weak to withstand the buffing stresses of a centralbuffer coupling are according to the invention relieved from the greaterpart of these stresses.

I-Iaving thus describedthe nature of the i and like vehicles comprisingin combination an under frame and longitudinals connected thereto, boxmembers adapted to slide be tween said longitudinals, resilient meansdisthereto, box members adapted to slide between said longitudinals,abutments on said longitudinal-s limiting the outward movements of saidbox members, resilient means disposed between the inner ends of said boxmembers and taking up both draft and buff ing stresses in eitherdirection, a pair of drawbars each of which is connected to the innerend of one box member and is adapted toslide in the end walls of theother box member. n

3. A central buffer coupling for railway and like Vehiclescomprising incombination an under frame and longitudinals connected thereto, boxmembers adapted to slide between said longitudinal's, resilient meansdisposed between the inner ends of said box 7 members and taking up bothdraft and buffing stresses in either direction, a pair of dr'awbars eachof which is connected to the inner end of one box member and is adaptedto slide in the end walls of the other box member, resilient means,adapted to take up the initial draft stresses, being interposed betweeneach drawbar and the box member to whlch it is connected.

4:. A central buffer coupling for railway and like vehicle's comprisingin combination an under frame and longitudinals connected thereto, boxmembers adapted to slide between said longitudinals, abutments on saidlongitudinals limitingth-e outward move inner end of one box member andis adapted to slide in the end walls of the other box member, resilientmeans, adapted to take up the initial draft stresses, being interposedbetween each drawb'ar and the box member to which it is connected.

5'. central buffer coupling for rail-way and like vehicles comprising incombination an under frame and longitudinals connected thereto, boxmembers adapted to slide between said longitudinals, resilient meansdisposed between the inner ends of said box members and talking up bothdraft and buffing stresses in either direction, an axiallf, arrangeddrawbar connected to the inner end of one box member and adapted toslide in the end walls of the other of said box members, and an axiallyarrangeddrawb'ar at the other end of said coupling, an extension of saiddrawbar, comprising a pair of parallel rods, adapted. to' slide in theinner end walls of said box members, and a bridge piece connecting theouter ends of said parallel rods.

In testimony whereof We have signed: our names to this specificatlon.

J HN IT HE JOHN CECIL GEORGE oossnr.

